Mike Dolt Enterprises
Mike Dolt Enterprises
User: jsmalone1, Location: southwest Missouri
Asked on: Friday, March 18, 2011 at 7:52 am EDT
Answered on: Tuesday, May 14, 2024 at 2:58 am EDT
Question: We replaced ceiling fans in an office area of a customer and installed the CFL supplied bulbs. The lighting circuit is controlled only by a wall switch. The lights flicker intermittently and almost strobe, occasionally, for short periods. We purchased 2 other brands of lamps but had the same problem. I am told there may be a copy machine and/or computers on the same circuit or neutral. I'll have to check that. The fans have a remote control for the fan motors but the lamps flicker with or without the fans even being on. Any thoughts or experience with this issue??
Potential Causes of Light Flickering with CFL Bulbs
Circuit Overload
- Excessive load on the circuit can cause voltage fluctuations that lead to flickering. Check if other appliances or devices are using the same circuit as the lights.
Neutral Line Issue
- A loose or faulty neutral line can also cause voltage imbalances and flickering.
Incompatible Dimming Switches
- Some CFL bulbs are not compatible with dimming switches. Using a non-compatible switch can cause flickering or premature bulb failure.
Harmonic Interference
- Electronic devices such as computers, printers, and copiers can generate harmonics that interfere with AC power, causing flickering.
Troubleshooting Steps
Check Circuit Load
- Unplug all other devices from the circuit and check if the lights still flicker. If they do not, the circuit may be overloaded.
Inspect Neutral Line
- Check the neutral line connections at the circuit breaker panel and all electrical outlets. Ensure they are secure and free of corrosion.
Test with Dimming Switch
- If a dimming switch is installed, try replacing it with a non-dimming switch.
Isolate Electronic Devices
- If possible, temporarily remove any electronic devices that may be causing harmonic interference from the circuit.
Check for Electrical Faults
- Inspect the wiring and connections for any loose or damaged components. Look for signs of arcing, burning, or discoloration.
Voltage Measurement
- Use a voltage tester to measure the voltage at the light fixture while the flickering occurs. If the voltage drops below 120V, there may be a problem with the circuit.
Additional Considerations
Low-Quality Bulbs
- Cheap or low-quality CFL bulbs may be more prone to flickering. Consider using reputable brands.
Ballast Compatibility
- CFL bulbs require a ballast to operate. Ensure the ballast in the light fixture is compatible with the bulbs you are using.*
Light Fixture Leakage:- Moisture or dust can accumulate inside light fixtures, causing electrical leakage. Check the fixtures for any signs of contamination. Flag for review